{
  "manageEntity": {
    "action": "Save",
    "entityId": "219216681",
    "entityType": "Track",
    "nonce": "0x549fa7070d3dff27b801ed9216ff2d7e07475979f187bb1d804610b0526b7338",
    "signature": "0x19489b286d244a2f77ec74e09c4c5e56a859f41a332e740271acb6f35d09f979349760f170c007e4c65f90ff58e35aa99cfc6df7fd808d6b3623340a45e6d95c1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}