{
  "manageEntity": {
    "action": "Save",
    "entityId": "1231919061",
    "entityType": "Track",
    "nonce": "0x6db004b0f2984a0cc7cd8d66aa7e3c17acc5f2d71a2f1577825754b3bd7c0cd9",
    "signature": "0xa836bbebf1ad2f8bb9e23ef09e316b674ddc90708b818d9f6ee40e179e1042ce4a3212bac9c81f12dd09c1504627549471d5320098521c41e6792c0ff73d66551c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}