{
  "manageEntity": {
    "action": "Save",
    "entityId": "326999624",
    "entityType": "Track",
    "nonce": "0xa7813caf9288a059db1bf7c53bbae1cfb8b555ab668fd76e25e22e5b06ec6e31",
    "signature": "0x7dc0f705bcad57857f51376884119064726a0d988abfd0950bcf16e827fb6d0b2c6da61fc3370025066e7a05e6d47b50a4596f62d736c2760bcb4c18b1fbe5f91c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}