{
  "manageEntity": {
    "action": "Save",
    "entityId": "1650557768",
    "entityType": "Track",
    "nonce": "0xb935e4fd7c7571ecfbe92bc4a33b41b7c231731f5a9bd9047371791ccc03bab9",
    "signature": "0xa9cd4147487b26d29941549e4c018208ea7d3f72efc13b66ebc326fbc6f675da2a62890ae9f44722c1ff6bd8565c7beed0b7f75852491e5847889fbb3a4b3c721c",
    "signer": "0xcF1BC458908F84936B19Ca8Cf67C751CD647B02b",
    "userId": "310796"
  }
}