{
  "manageEntity": {
    "action": "Save",
    "entityId": "293382",
    "entityType": "Track",
    "nonce": "0xe365c51d9c2c8add7d3533c3a609a124cc7d46f4981a661328939630f5f4c9ae",
    "signature": "0x424f52176efbf1818193989bee441bda54c90ceaf8c3b65c0cbd89ad31c4b91c524e85f1b6832457ee62230469f0660227fc03e3c8b4a39f6f793625c31b31b61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}