{
  "manageEntity": {
    "action": "Save",
    "entityId": "85993",
    "entityType": "Track",
    "nonce": "0xea4d075a791ae7fee99afe766ff89eebbd32e2220b913249a457d3a1e9dd3e4f",
    "signature": "0xa80f7791a311360881f446e2f919b296178e54c365d26c587696fe8e494e60123b14952e9d99c1bc6be68cc66f75f40b12ee9301fd71a694c7aeb259ec1bba2c1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}