{
  "manageEntity": {
    "action": "Save",
    "entityId": "266276",
    "entityType": "Track",
    "nonce": "0x6b8ca7d33960716203da0dc1fcf28fe16fe4b7438ecf22de3634788d7d341a99",
    "signature": "0x33cdf4b37b313173d5e1e213aea61be064e4052f8fc4ad947617a234d0cf92d4014c0f8f986c5aa21e886ca9fd28cde9a50c52286010084f28112feb8baaeefe1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}