{
  "manageEntity": {
    "action": "Save",
    "entityId": "971815327",
    "entityType": "Track",
    "nonce": "0x5058c6d40983509af7735bf91d15c652b531db09b9d339f8872fe1ad9b14d3f7",
    "signature": "0x5f6e80e41a0afaa99eab06efd96a5aecf36c13fe95cf67967715a9cad6b26b5e127ee8aac901e76fc66cb6d25b5ca93e7305bb8de1a466780097aa7980cbb66b1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}