{
  "manageEntity": {
    "action": "Save",
    "entityId": "1363800537",
    "entityType": "Track",
    "nonce": "0x75dc9b4ca09ee40e1aa310b8733ec5689d5576231410a38250e98255a60ee4b9",
    "signature": "0x9931f868fee6005296d4996a8e0e173e4ca1488a3db1aaf1968684a11e1b6fb343afd3ad07d38d630a68d7c89419ed956cc3d6e660bd6ee3be66a66125f7f13a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}