{
  "manageEntity": {
    "action": "Save",
    "entityId": "723233723",
    "entityType": "Track",
    "nonce": "0x4854d0045e850bf7999c7df06eb457ea3ce99ce4e2d4c9a8a2a6eaba68a87a1c",
    "signature": "0xc95f33fa3e0133fd2324fbf4bebde61c378da9c1fa6e06f82813a720e596e8181451790c77fae1866bd30db9a0496020382dab71f408c363bdb24435dbcd12721b",
    "signer": "0xC7f1C5c105933bBdAC0c8A3219204f23AD4f3320",
    "userId": "381638009"
  }
}