{
  "manageEntity": {
    "action": "Save",
    "entityId": "656223793",
    "entityType": "Track",
    "nonce": "0x8e3604ffaff429e4c2dcf620d778fd46c6009fc1506384cb9026d986205ca67c",
    "signature": "0x377c3d9326043b1a1466bb7c57f7da3ae6be1e9d4a215bdbc076e5d2fc56469036180762f230f9968048c54ed27082e03cfa53c597b7e842165c4ecf35ecce1f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}