{
  "manageEntity": {
    "action": "Save",
    "entityId": "1245796017",
    "entityType": "Track",
    "nonce": "0xb4545b02f352764698835d011c7a79b169b9d048a8addf15ffa4b6f7cedae3a9",
    "signature": "0x5157a41007fb2557acdfa5801a1289cd345ee780a12aba2b4180cfe32aa090454cbf13e6a9316a734321ee1971acae2c07e712d3cb9f2ef01ccbce77233ca7e21b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}