{
  "manageEntity": {
    "action": "Save",
    "entityId": "954288453",
    "entityType": "Track",
    "nonce": "0xd598d1bff47b14190027e7b0ce4e372dafc8a6d9e4da5013b9b6283986bd19ae",
    "signature": "0x048216621f6cc57bf7ba741a9aed7b0fa986c1209feb64a87a0f30bdf2bc96300d48068c19e5374355214125b16b1df203029ee494f983c0bff5aeeddcf5a4fe1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}