{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142844641",
    "entityType": "Track",
    "nonce": "0xf6cd2a4dde8bfccf40135deac8d111820d5438b2b5fec6242e651814790b0b9d",
    "signature": "0xa93b5a5399ca9563ccde63b667d7cc3aaa9ba290469625be14c63e175d96e4a277c340e90dbf96b91d5f804019d086f726d3ecfaaf425408f2d0eee835386ecf1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}