{
  "manageEntity": {
    "action": "Save",
    "entityId": "717728789",
    "entityType": "Track",
    "nonce": "0x50c4b216a9550be1b19ff15b6ddfc11b93d4bef4cb411eeda2ef4e1748147dec",
    "signature": "0xae9e47b4cb977e91c8da75343779b50f087812d6be622329b11285fe49c52b01191b95f2271f68094e3a2b450076f3fe44b328dfcd0fd5e04ff55c73237609f91c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}