{
  "manageEntity": {
    "action": "Save",
    "entityId": "250341094",
    "entityType": "Track",
    "nonce": "0xd670ed5f3a09392ad4dd7379e9210715432bf8ae6e59894bac5998483886ecc6",
    "signature": "0xc701025dcacb38dc16a9d4efc57c5d9deb1b982580f096d68257d2de2f13b1a71698a92d1014fc243ec6a35f51b7ebd14c3cbc252b6095b0b68c09740c6081cc1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}