{
  "manageEntity": {
    "action": "Save",
    "entityId": "38642",
    "entityType": "Track",
    "nonce": "0xb35e4212128147a928618f52271782a2648f0785feac2fee23c09afe1151b174",
    "signature": "0x225dc878059e959afdadb102b5677d882f2fc5c4fc51606a6b0c677fa0839fa17018ba5fb6ee8c534bd506df666232a7fafdc6b88e0352429e174e4d6fc067a81b",
    "signer": "0xCCe749020E45FB96926be24f94FFA5f35e955e66",
    "userId": "810833505"
  }
}