{
  "manageEntity": {
    "action": "Save",
    "entityId": "1562882428",
    "entityType": "Track",
    "nonce": "1792480015205882654",
    "signature": "0x1f9f60781440a7e78168ac43202f23641a90747fa2048998c72afd12fe198294333fb663c9afae1316ee719fa8201fdc08c0211de9132669ebfc6f4fe279fff91b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}