{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906823505",
    "entityType": "Track",
    "nonce": "0x8bfbd41b24331ea604d3e96fdfe22fc3869c258a89834829aae285a5327e0aa2",
    "signature": "0xe211d2e5925b9a2e8448f2fa8038fd87977b1e88a913855b5f6f740e0f880c8f6fc8aaf65aefd7b1bcf1c3b55e633240bfd62ef32469c6cf06b9c3d680f347881b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}