{
  "manageEntity": {
    "action": "Save",
    "entityId": "1376080729",
    "entityType": "Track",
    "nonce": "0x7b04ff7eac54927e95d2fcee949db88a0f8ace2050f5beb0231aa12a977f65cd",
    "signature": "0x50e258bd0be405d965b2c48389e32bf4f6e3f70acba768d58e6d2d30e08839ed3bb45c3bffafe465e9c43665b7117e8d0ab3b2d49345d8d957c190382b8ebb071c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}