{
  "manageEntity": {
    "action": "Save",
    "entityId": "288126959",
    "entityType": "Track",
    "nonce": "0x04f8c3a827580c990283c6417411194a0bd7ddb1e7eec60edb9e136642ebe642",
    "signature": "0x8d549c6825af8c3521f5fdd3f8e0d41609a85b8c847a4d702ca1e75c96c18c4d36021347c4c3957e13caec8a16817fd83562c60c94455b852e7df0991459f8d91c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}