{
  "manageEntity": {
    "action": "Save",
    "entityId": "205478147",
    "entityType": "Track",
    "nonce": "0x83bb295a3d8b7104b50d79f36d98621af3b9dd5dfb704877144862508e5b644c",
    "signature": "0xf206c385425896dcbe1870326cb558fbce03662c3360f9a9252d393d02b04d9a02bfe88515f45be68856a82b17c488ee9045f90458ed926a62411f3c95ce8ae91b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}