{
  "manageEntity": {
    "action": "Save",
    "entityId": "440488775",
    "entityType": "Track",
    "nonce": "0x61c73c7f57e4bb5aa8198ffa0d044cf5069f2f1f8f8ed7f123884d79495bff66",
    "signature": "0x225e1e3f3f61350ed49628c7e7c28d7d06d092ff41def2e4a65bd6c1c82a65593812271b0a077648f81ba82f2419c3dfaca89fbf5d481c65e4a93db99df4ce8e1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}