{
  "manageEntity": {
    "action": "Save",
    "entityId": "954474",
    "entityType": "Track",
    "nonce": "0xdedf92db549ac6e78d5616a7d76411e864cadc4c2dc7d1dccceb87db11f0403f",
    "signature": "0x1a2996698f47affe60c139bc0d5892c7874d34c46cf10ba3fc38c3d2aa1ec2a2554ac9284399304cf5ec5b6d6cf9f4dfb8a57e64a9f5e233c2e57aae8f6c2e221c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}