{
  "manageEntity": {
    "action": "Save",
    "entityId": "1498068910",
    "entityType": "Track",
    "nonce": "0xaa93350e556b4691595d8d0086d4e93244cd385b0bbf8dab8122074a8d47c430",
    "signature": "0x31d49f765708c258754a4ea08a00d5104e340d63dd7d29069c2988483915c6337929bf04a6c12052347778a0ba00acba2367e1f5f1903a4d95c32f4f0a2d0b101c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}