{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931775536",
    "entityType": "Track",
    "nonce": "0x9505a12e3d322f61b63052287e4d8375097b0e2a60b4990c1545c61631492431",
    "signature": "0x977eb19b863afc656c8b85c7e5b694b221b3b2740e39f566811276a0a8c66cf071739d5d3a342806c2acda799349c47acdff296a40977b2b79b3ded483b672311c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}