{
  "manageEntity": {
    "action": "Save",
    "entityId": "34466292",
    "entityType": "Track",
    "nonce": "0x1705aa78abbbd640574048fa25150d6853dc63da74844e15b029b3859fec9a05",
    "signature": "0xf11b7da3ec65b3ea15af2b07434d8f0ae78df43fe28dc9d4859b397751189a5e3dbc7df02e4799eb723f532a225b6ded9d48898ff61b5fd63759a2576868cab31c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}