{
  "manageEntity": {
    "action": "Save",
    "entityId": "307770310",
    "entityType": "Track",
    "nonce": "0xa6f44e85605a2770a72078031b3d2b33ea67528e2754e80ee9b5f770706e945f",
    "signature": "0x2e0077db0b68e9998b583e28c26c00dbda9c826608d81d33ae5b6f45681700a903a9425c127e4b2c0a97f6ef9905cc7156290b5f8fe263057e3b76bb1465d6fd1b",
    "signer": "0xa34Ced4F52f585b36D7A5c2e45906594B875e6CD",
    "userId": "425430290"
  }
}