{
  "manageEntity": {
    "action": "Save",
    "entityId": "426633781",
    "entityType": "Track",
    "nonce": "0x96e00e3a6dedbecdfeff42d45fdaf1beee53766b9f02aa8d15e57d094c57794f",
    "signature": "0xa66f4edf66bde95889bd01a941ab40ffaeb0cb56c5a72ba89ebbffc6f659be253a636fc2480d9cf0e831c42b233e35a0fb45ccfc786f2d8d0e82b59eacec82861b",
    "signer": "0x5E1b23614a9da638dba09e8aB2E9B76ed81c688f",
    "userId": "306948669"
  }
}