{
  "manageEntity": {
    "action": "Save",
    "entityId": "151106",
    "entityType": "Track",
    "nonce": "0x2825c7cd71b21ea6ec8ce662e06004076bde95dd0579c6e45d25cde86d5ceaaa",
    "signature": "0x86a9826d55f1a98ac2cd1aa47d2f615df968a8ef1484726a35c9c91aa936990a00720115036eab912a0c883581316729606178cbd8a04c3ac31ba388def390561c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}