{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385220068",
    "entityType": "Track",
    "nonce": "0x5a6621da6dd792bbb30338b5098e224aa81ad7caa4ce38b9c599b4ddd89298f5",
    "signature": "0x90faa9c3ddf0bb14bf9fa71d850a4c9da5ff3df15b8f48a4673d43b1ba28d6414c64f366ceb4b287385b9d2b19f499f0b975358c83764531b1da8ef9a7bfe3f01c",
    "signer": "0x4a32dde6757c86F147e3C1Af86284568E19D14f6",
    "userId": "985727"
  }
}