{
  "manageEntity": {
    "action": "Save",
    "entityId": "920815",
    "entityType": "Track",
    "nonce": "0x90d5bf842edb6fdc8ea1e13c0e30446ae7f21cb40bf14bacf2a7da268a916af1",
    "signature": "0x5d447d27630dde33eac3cf05ed02ded51624126cd88de1a411a016d6057b06bf1a6ceb9c1aa25e2469cce172a4e2efccbe5fc50a1c2d550f2a80e6d6ffd20ecc1c",
    "signer": "0x363CBf6d8B655c537320B185e43Bb3A8B6c5267B",
    "userId": "80027938"
  }
}