{
  "manageEntity": {
    "action": "Save",
    "entityId": "1078912",
    "entityType": "Track",
    "nonce": "0xe989fa7115bb0e995a38ad56157c452bc01f28f0780aa364523067fa8d82e4e3",
    "signature": "0x39d9a237f8b773eecb715a0d3e8a44da4111bfff00bc2da81da7a38f3d5b890036fabb93e890f1e91f33956b21af680e82ac7fac073ddf216f079e294a04b1a31b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}