{
  "manageEntity": {
    "action": "Save",
    "entityId": "2122588914",
    "entityType": "Track",
    "nonce": "0xf461f607901486f5e7ac57f27b598009c5ba5486cde86f644e22a7f4a63d8023",
    "signature": "0x744da8a57b11a873fde6d042b21b553b96f28b63525a118529620f690bfd8dfe6debb1112c4e4b7c46e8f1a31196c2864f19a3e36e890d702316f0a5f318e0a81c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}