{
  "manageEntity": {
    "action": "Save",
    "entityId": "702199",
    "entityType": "Track",
    "nonce": "0xad9bfe3634956592c7bbbea545ad1fdceea6c24594feff3b6da43d7b8c9aa558",
    "signature": "0x144d7845ba79d6fce118e5f66035663242b710a3cfafc35aa02fae99beeec1c6334c08222ccf18b83f89e871471b15826ebc46cc2d35eb78401d7e15809a46751c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}