{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309780980",
    "entityType": "Track",
    "nonce": "0xdf12e9927ed59989d7f9dd6da97d685d42c78a9bec075e9f0c7151d56af70267",
    "signature": "0x180deb3526b6dbc880f166cae054bf95a22427e9907c0e1bb09cd22da79d5dce64eeed51e40ad4beb3ac6acaff8bc45348a81c6b0c152230b5bb65dc808503551c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}