{
  "manageEntity": {
    "action": "Save",
    "entityId": "1078981129",
    "entityType": "Track",
    "nonce": "0x4d1f2a22b28e32d0eaa6666fcbeb44194c09dd473e2215edf8649270b17d0819",
    "signature": "0x90168f4a0eea7e84033bd5df47948569f971d4b564ee49c00c554a0c2361a97863818b66b7b0ebae9c5fc427e423d08f56c75b1262be66717f3ea63fbba0ad4c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}