{
  "manageEntity": {
    "action": "Save",
    "entityId": "1384285598",
    "entityType": "Track",
    "nonce": "0x49bc980bc07a25ac600e5045d64bf1d6d0f5f23c8b23715362482cd7b0094049",
    "signature": "0xbbb4c44202ec136fe455a2919cc8fe0a38fe950347120e235fcff9f0d593f7034341cd0dec521ffab041d9632668902e3f2315bdc03af726c832bc34482e12841c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}