{
  "manageEntity": {
    "action": "Save",
    "entityId": "1217202133",
    "entityType": "Track",
    "nonce": "0xad7aa145ff94c0146bbddd513cfa48057ab0aea15893a3042160f39d0db47b4e",
    "signature": "0x80197e390df48c5a2171c7f9725774c64abfbfdcbdcb81751fb85f52f059c11a66bf0037fda72fbb88c7c0a91588bc0dbfb1137279cf43e3b4918eb9eb9ed3681b",
    "signer": "0x484d8957F3f2AAC8A75b6c9769692fB7Bf806850",
    "userId": "413536646"
  }
}