{
  "manageEntity": {
    "action": "Save",
    "entityId": "885382",
    "entityType": "Track",
    "nonce": "0x95913b3291c924d4c8cddfd800d885b1eb27d2bb63aa1a315f5e119a5cdb22f2",
    "signature": "0x04e7ba162ed24decb5e15304344a26fd78719eeb7bc59c053fb6754dc9e2390547d6366a36fbc1183cea288c9f731de3b93d16e75f89bbbcf6f5ca1d8fcb8c5d1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}