{
  "manageEntity": {
    "action": "Save",
    "entityId": "375236",
    "entityType": "Track",
    "nonce": "0x38b0d428b0b3e5ee1f96752e56410e15d40dc81d49edd685ee6632d22af0d1ac",
    "signature": "0xd7cc0e4bf87b19bacabd204c4a63d4f455241e0ff215c682d9b61328834d8fab2455f715ff2b6a63adce207b0b08c92801ef8af995dd708b003cb93186f6b4e61c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}