{
  "manageEntity": {
    "action": "Save",
    "entityId": "162167071",
    "entityType": "Track",
    "nonce": "0x9cbfb90b7f0674f11cbfa9922d9c469348242969a4587fb0663d83b5153fc290",
    "signature": "0x08134410fc897b99344e3b2af6b5d300a2418ec47b4339d42246c67c16997079652a0b66664d86ecf121783b7dab17fb5bcf5a979e6b6245bbf7f1e2a804ff211b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}