{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618809617",
    "entityType": "Track",
    "nonce": "0xedf63341e123e408bf3ffc08ac0bc3d05fa3728eccaf6144bd45a5dce0133948",
    "signature": "0xf71a7561933a403a60cc7d0c1c732af6cd69cd4c1c8723928c3a492ac4e46353194d9d4cd3131afa1741d157d965e4937716654e3c52c0cadde81bb2569a99001b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}