{
  "manageEntity": {
    "action": "Save",
    "entityId": "713564502",
    "entityType": "Track",
    "nonce": "0xdc48567f9d1c766f7bf3be885bd19191282070aead6695ad9d4f52bdf6ca3df5",
    "signature": "0x9e4514c2bbf79b9e6c7d7b3422b7bca8d8bc36a04964e3de0f84837b662530a8746441ede95a34278585163eb024cdd74b2f8c189b29c2fc51d72978d431e7111c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}