{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906575352",
    "entityType": "Track",
    "nonce": "0xab6d725a8089acdd786201f8400d83d7d3d62bc46431561c98f8301a276626d3",
    "signature": "0x032f104d8d477162ad78cef1b4e1c59618d34b7dca4074fc768367832e8c63b92f4a92362dcd9a6a6ddd30972bba96f93ea28394bc1c14d74e83c91eef7218b81c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}