{
  "manageEntity": {
    "action": "Save",
    "entityId": "492690010",
    "entityType": "Track",
    "nonce": "0x506607be89f4547c762230f5e8db8b21487d694134dc6a159e68be9f0f4a6404",
    "signature": "0x3185d4440db513aebc3240817c4a3cfcf2042a37b567a046d950fecd1d98acd1343c44f05fe68ee399dd32679192e6001587f98032d1f198831384f87117b0a01c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}