{
  "manageEntity": {
    "action": "Save",
    "entityId": "598967047",
    "entityType": "Track",
    "nonce": "0xd5d92f98b7ebe1963abca22ce4fafc81559e98f53582ef1f749a3927df7e812d",
    "signature": "0x1b14db23d1af327fdff34b58d684d3d8e820148b656905cdf13e38e85e53777b5f0389ec2740b0d4938b0ffa6a09c1c5b04a560f52d2a59fff1d91756db9d4ab1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}