{
  "manageEntity": {
    "action": "Save",
    "entityId": "1357326957",
    "entityType": "Track",
    "nonce": "0x0f0febe6996f323bddfbb018192067954caa8834faa6ba6e4290f6da777edf35",
    "signature": "0x3d4d93a07dd0d7e0359f1ac790ec53a7437a1372a0973bebc0739ffe307bc8d472f04d67b65478d78ac0e35bf81d5ba92f82ec88b7aaf3a8402bf1ef2a2191271c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}