{
  "manageEntity": {
    "action": "Save",
    "entityId": "1941591449",
    "entityType": "Track",
    "nonce": "0x3e519fa52a94d77d07722710a141d17fc457838dde18651f452c1120a4f36241",
    "signature": "0x947b25922c5d5b2ae725402158e72cb6704462365319ff3c3896826fba8baa870f2fb9541ffdf11584501f5a6ae5f20133eb75273bcd54d4cd364e59105d86011c",
    "signer": "0xe9B3548997c57545A6352D16A021F6df1a01747f",
    "userId": "616597835"
  }
}