{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988128987",
    "entityType": "Track",
    "nonce": "0x3989761b44b1127d1538d6bac715e1f416c65656422684f4dcf9cf92aed2abcd",
    "signature": "0xefa6d04fd6e890265f6ccd59af89c0763e2b7f899594fc7add62cbcf6c9c6964015bb02788f3d228a82c09feb46f20bc9963d4dd1327c13ac14b7ad1a0f0890e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}