{
  "manageEntity": {
    "action": "Save",
    "entityId": "353231",
    "entityType": "Track",
    "nonce": "0xc80133242ad7f406631b9c79f72ea6c1da32878269c076b1c8c7b15cc410e3a2",
    "signature": "0x451231a105ed22ed06e6d1cbc978cc3ad084ef63d793151fc757bcafc9c594ac5703814f794c0ff1222c8905f9d1690a45048c4a3ad8cf92268cbd7e5e3c326a1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}