{
  "manageEntity": {
    "action": "Save",
    "entityId": "504546743",
    "entityType": "Track",
    "nonce": "0xb3c2555162e5a217f7e494e68606af25ff20b8f6b68b9dc040de4c28acdca5d1",
    "signature": "0xa0443362e9d41e415786321bbeaab0d94184c2cb5a870d81a3198e1e7ef61bf1195f85ddeb91e205e1fcd97f2983865d2518c00f33db09a07b3f67160d8ff87c1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}