{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235860255",
    "entityType": "Track",
    "nonce": "0x00494b3eb28968dabab9f0edf1bb20cb4fdd2522ac6dced63c9ac7316a46de7c",
    "signature": "0xf2e626fd4b4ab145cde66e19e2b4f42cd682b5e3470b9fac530635f81f1106671efb06cb47d78e324165c07192724699f2f0b82e82ec0d7c97aeb4fe15f007971c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}