{
  "manageEntity": {
    "action": "Save",
    "entityId": "1059619",
    "entityType": "Track",
    "nonce": "0x490b3f67281d3fb885d3fa43f818b5903c8faeba4c10b507aa88fab2fa3d2043",
    "signature": "0x7a159609f8a734f23395fce37196acff4ffa4858b32f4abc734a1583f27153a1621e9082594736efdcf305049a51facd8a4e58cd9af2782129e7a19d29127c6f1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}