{
  "manageEntity": {
    "action": "Save",
    "entityId": "1110867399",
    "entityType": "Track",
    "nonce": "0xb3934251ec90048fdf8c2b68d3fa57fc7a22540de591ede08e92bd40c2f98b2f",
    "signature": "0xef8129726b9a43636221398b9371f5b3af0fce5cb054abc58caaf05d299ee39a08b901c946b07e70aa29fc7bd02aed12c53b730112208462e3224d4c3e5f210b1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}