{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345364231",
    "entityType": "Track",
    "nonce": "0xf2d2703106dff6dd9558fc9b7f22c487c0fa10b031eec28da364f84b6b0f85d7",
    "signature": "0x04ece4ab85db6a1ecae55a6649cd9885c9098e71ffcbca29f9027027da2392e86a1f6e300c2890065bc26f526cf3867bc955a8f4e584330c612cae47dbf8046d1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}