{
  "manageEntity": {
    "action": "Save",
    "entityId": "742544264",
    "entityType": "Track",
    "nonce": "0x9dc27c3c5d3d20f289e0de6fbf7fb45b34a5ee074c0475f85c4077802159a0ee",
    "signature": "0xd1f01286092a98c86e3262473618bdd2d2d7d6be4c198358b0ac4c049b65ceac0fa2284f72c3dbab69ed134089a785579a3162651926381cb0421472e5e9572d1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}