{
  "manageEntity": {
    "action": "Save",
    "entityId": "691480",
    "entityType": "Track",
    "nonce": "0x7b5b8038d12f4ce19a61f81ecdf83407683667d191378503f675b82ed7a375ea",
    "signature": "0x97a4e9e2caf58479ba5247a806685e61fb65b4f5ffa17d5e657cfd0df529f5c568ad073e0f046b8214179016ca4fa43420c788aa18af91a47b3e528e522f4b9a1b",
    "signer": "0x96F25BA81df0482778A947af84C03800CF5f5d64",
    "userId": "993166642"
  }
}