{
  "manageEntity": {
    "action": "Save",
    "entityId": "988516",
    "entityType": "Track",
    "nonce": "0x1c12912a0bec588b1db486b64fd5e18cf203e90bccd90e4a6cad187f95758de8",
    "signature": "0x66e5534b08ab244f98bf5f49d7f6d744517e4c336812fc4e0eac3bccda2db05f5e048ca2b46579598513a6af9cb06f2d336f13286f2d4fa082eca84f03ff007a1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}