{
  "manageEntity": {
    "action": "Save",
    "entityId": "986386048",
    "entityType": "Track",
    "nonce": "0x72928dc9f7120b5f58581ee5e49ee91e359d014d4c55a037b64fecf7d2e706f0",
    "signature": "0x22cd9fb8476c5c23864db534863e825fc640a4d4c5450be16ba5504e6596dd72593241988724446934c64534bff010660f3dcfd3c4eab3356c2aad761c12a5f61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}