{
  "manageEntity": {
    "action": "Save",
    "entityId": "1222552142",
    "entityType": "Track",
    "nonce": "0xa865a8ca4d0044f697ca4c0c18c7179ee31b1891a0143acc3b30c5151e700f9a",
    "signature": "0x743b2e9fc826bc4afc22db20e51d24a8cced4078823a1bc22cdd85471e0eedcc68282152fc6cc88bf6b4999945ce1447c67741843c75703fda8504ae20b067551b",
    "signer": "0xcf1f3CF82aA41361e21a8d4ed015Ea3A1aDd1C8b",
    "userId": "238180"
  }
}