{
  "manageEntity": {
    "action": "Save",
    "entityId": "1749881103",
    "entityType": "Track",
    "nonce": "0x02bc4b1e8df75412058721adf901974e35aadeb638926df1e2e922911493bd51",
    "signature": "0x3ab7bde661f932a9d4253c33a1d4f7557ee6fa96509632dab7e9404a2d43bff9260c3adf1f58818f9f134f319f72840d315e8b445513dd2cf2623f9fc70b48f51b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}