{
  "manageEntity": {
    "action": "Save",
    "entityId": "333242",
    "entityType": "Track",
    "nonce": "0x9d808e58af0a60af4e77bffcf4eaf01a06bb36ad74f6b39f3a20a4cd24b1cff5",
    "signature": "0x863f5017a837d45a1c777d5543b76b58d5866a96eab440681c6d312977f148220206e1df647d78089cdc4b185e11e68033212c8069eafaa30b4d3652693122921b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}