{
  "manageEntity": {
    "action": "Save",
    "entityId": "164385968",
    "entityType": "Track",
    "nonce": "0x664010207d8295a4d7e8b00102d5310b2e0198231e31f590458571b22a988261",
    "signature": "0xb5a86fafd12fecefedd82c07a408bb783a8fc0002bf30f2cb6d8b12dd5a73e02263b651cef0bcc5adc24bb838c535db5cd6c05918ba9d70c2fc4e661ea3874821b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}