{
  "manageEntity": {
    "action": "Save",
    "entityId": "1918233330",
    "entityType": "Track",
    "nonce": "0xc3807c7a6a2c06620d439b15b53271e657e2e84a689e60223179f6d848ad6f66",
    "signature": "0xf4d1b020b470a23240dcb0f23caa9be72cc01ba461ce413fec837b49bdac97e1087fd1c01e56115105d5fc888478799dc6ee0e217bc422c9a8f28587a410fd0e1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}