{
  "manageEntity": {
    "action": "Save",
    "entityId": "706554969",
    "entityType": "Track",
    "nonce": "0x84e054c8b25f791b9ed362d19210ad32c63072f65f6ee485e69431277f4f610c",
    "signature": "0x320b774e9a1f73b5ee22b99b9cb5f5d0723269880552d6f851d56f6cb050454905244490174ad5ac46b5d17afd035e8ebf5dcb54d5be4631676c3dcba5742b741b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}