{
  "manageEntity": {
    "action": "Save",
    "entityId": "1541907398",
    "entityType": "Track",
    "nonce": "0xd9e3b40e80fb534a1e340ab52ac7edfcff4ab62533400554a05414c3dce6b2df",
    "signature": "0xc0b855cae38e508753dd9c12f35807b3f2c7dbade02ac40057befa8d9ced79d1518f16df3662208f05bb33d0df0c4cdd6633f357ee5978008b068bf508b40e351c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}