{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309094608",
    "entityType": "Track",
    "nonce": "0x9bee7c86ae5893ddad0759f41b2b29048769e833c9ae5a4230c7cacbac822cd5",
    "signature": "0x4e1ff7a14842c73a216b472c5d15a3ab0658d8d6a9b38eae2cb8e722001452391bd583a8c82b6cae4c55cb2b1e2b19e1e34cdc632198d4e39f6025a5fb6817281b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}