{
  "manageEntity": {
    "action": "Save",
    "entityId": "355542957",
    "entityType": "Track",
    "nonce": "0x26e0e69907df64b68f606a1ec07bd60cea92ea5c322dcc27159d09c642d19204",
    "signature": "0xbf379f2ec17b798ca2b557f0782fc88cb6d21e478f67ae8f8ec7e4aa557ca0490118715cbc10cf7174449ed684f2663d69b854f40652fa4d25b091cfc2156db91c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}