{
  "manageEntity": {
    "action": "Save",
    "entityId": "1211511033",
    "entityType": "Track",
    "nonce": "0x834d5f4816bbcb6a5dd3586562c30e0e8b1edebc526e28b0111db331d03ddbb3",
    "signature": "0x4f07a24d2ee0a8173ead249c63107b52f0b1ea2fe72dee71e06031e9963dd4c4310c6a24df3122b3431008505a9d81759f7a4fa5d79ed4656d62a5e7cff1197f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}