{
  "manageEntity": {
    "action": "Save",
    "entityId": "434322495",
    "entityType": "Track",
    "nonce": "0x16a4b684b5e45b183ca23de047220ed53b9b1b92c4ee08909696f06bffec3cfc",
    "signature": "0x29885a14a42e689e16fbec577d34c9acf53658df7b6a454526c9b6f4280288d348929e8802eac08c1854cf2b57777d5e3b276a26f719d9206cd6c83178ff4bc31b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}