{
  "manageEntity": {
    "action": "Save",
    "entityId": "1814503268",
    "entityType": "Track",
    "nonce": "0x1af2c4156df575b56820b77610ab270894b22c09e1ca6b26a3853d98e4595efb",
    "signature": "0x12359b2ddb203e5917ba69550bbe286ca8c2c05bd8d2c8c7226a91485f3a132c6745de4ef2f996e4452d51d948fc73e036eec81a89c43f11ab05bb8543ba998b1c",
    "signer": "0xd14727622fa26ECD6Ad72cADB6b96823f5fb65DD",
    "userId": "173494086"
  }
}