{
  "manageEntity": {
    "action": "Save",
    "entityId": "18475954",
    "entityType": "Track",
    "nonce": "0x4f1b78db72a1171a1ba0e54bbd37d5fc1019cdea668b22ef1e3a1f8a086e4369",
    "signature": "0x4d23bc14fc638e6645cd9c151b735aa10567267b34770c9f555b549cc830e32a685a152ae41ce70f3a92e2329ecf10a9d85d0132094438422ac6eb4896dd486b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}