{
  "manageEntity": {
    "action": "Save",
    "entityId": "307775",
    "entityType": "Track",
    "nonce": "0x091bfecc01145cc0c4b6302889a55b1dd67c0c339366d6e368a9f69630f7e860",
    "signature": "0xabe54593bc1d502471b532979a9b8cfd754b906e9e35ab795a47e1857a2a62646b6dbb0fb5e0be72bd180aa9d76b4b6c24661c859d4af0c20aabb4bc4aedb2d01b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}