{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807091300",
    "entityType": "Track",
    "nonce": "0xf3872d13450ccdb47f0205b0aa31bb5e852142a4efd2478cdcf40c4a4646d92f",
    "signature": "0xcd3b745a5c96dbed57efc30fbef7fea80c3b502f3261103ed99608970be269334922aa2b54714f370933049156dd39e120120ec0e6c08aa9521511717e0c08351c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}