{
  "manageEntity": {
    "action": "Save",
    "entityId": "309737",
    "entityType": "Track",
    "nonce": "0xde8010d5190b4b387c82e38c16c9dc108ee82b21800baa7f56fd1945630ea9bc",
    "signature": "0x47824a322081ac1657e596802f78f6352434f7fdbef3293f696c9e5d0f0f5503361bce9741dea4d30a8ecc8776c7e373aa9869fc1bbb25b72e517c52852938001c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}