{
  "manageEntity": {
    "action": "Save",
    "entityId": "61639899",
    "entityType": "Track",
    "nonce": "0x319ddc51b3a8ab8074ea2959c4a3a1d23b37860a5a38e727bcadfd2755bb9400",
    "signature": "0x5b0a86c1fb21d7eb0bf2677dd2e894423b72e9253a184db4b3c5ecb751a99721617195f2ef876d56af57fbf045045a4dd6f9102992844ad6bdc0876bd6f576ac1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}