{
  "manageEntity": {
    "action": "Save",
    "entityId": "1184159390",
    "entityType": "Track",
    "nonce": "0x0abd6afe47993b53b31299372f53e13de19198aae03041955e0f1788225840fe",
    "signature": "0x87794bfc03a84cdbfcd3be631f6743d2439a8a5019dbb887b905c5ee79e270d404ef3afbf2edd1742de1cc9b165ada2cab1fc79ad5744b2913195312350ee29d1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}