{
  "manageEntity": {
    "action": "Save",
    "entityId": "969715153",
    "entityType": "Track",
    "nonce": "0x09bb36acdc4b1a73a6ec9443408f06bde8c92cf17f70a605f39c3e58cd7d0fc1",
    "signature": "0xc8b1fb0ccec5f83b6f1db3baa10a181cffb2984dbe652280cc8f129535e6619b599427231e052cab9d06ad958170cd2394b98bded97159f1a390b5fc6f28cb261c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}