{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559262262",
    "entityType": "Track",
    "nonce": "0x1e8b8beba99c8fc17615b681c5d58982f06b0103bd2195bb23cdfa234977ba76",
    "signature": "0x994ee4444532bcd4d6b2a9766f37bb564362ec2a0f28e0beb45e6cc0efe279da1d0cad9b692f799d36eb641897d1850beba7362186c61d2f0a02905a3327faed1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}