{
  "manageEntity": {
    "action": "Save",
    "entityId": "570833292",
    "entityType": "Track",
    "nonce": "0x30d49b9df20ee3f05ffd9ea22c44f4571698065bad797998c4143c53cb1db78d",
    "signature": "0xb7f7cce66256014914a5c327443c98d091586ec1608ccfc679b668acf658c03c22e3974aeb103ea6765231a9bd96fbe5eef6b1daac05b5dd6cddfa368d6a7d8e1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}