{
  "manageEntity": {
    "action": "Save",
    "entityId": "1085842",
    "entityType": "Track",
    "nonce": "0x6269f5d13eaa73ec68424af60e19741e16068a9406b2604116000b66a08c1620",
    "signature": "0x4894500629ed37be63ebd2639a5fdf6a0a858abfa4e9fd7515c9020fc10613550634b7af1e775dbb114b0b304449bef5c146e8a6c5f0a38d22d79c2c441231bd1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}