{
  "manageEntity": {
    "action": "Save",
    "entityId": "617927853",
    "entityType": "Track",
    "nonce": "0x5ae85da8026fdef58ea7f1b241194d856f42152407f037b401e6241ca4096afa",
    "signature": "0x32ca157be457db166a3a5c502048cbcffd8aa11a403da786c6719820a625d89e5a6609293d668946a792e1e0b129e9a01437770faaaf4a18da8b66a55f32f3b61b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}